Endo Pharmaceuticals and its partners, Teikoku Seiyaku Co., Ltd. and Teikoku Pharma USA, Inc. have received a Paragraph IV Certification Notice from Watson Laboratories. Watson has filed an ANDA for a generic version of LIDODERM® (lidocaine topical patch 5%). The certification refers to U.S. Patent No. 5,827,529, which covers the formulation of LIDODERM, a topical patch to relieve the pain of postherpetic neuralgia launched in 1999 wherein the patent shall expire in 2015. The company is currently reviewing the details of this notice from Watson. Endo intends to vigorously defend LIDODERM's intellectual property rights and pursue all available legal and regulatory pathways in defense of LIDODERM.
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